b^2+12b=144

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Solution for b^2+12b=144 equation:


Simplifying
b2 + 12b = 144

Reorder the terms:
12b + b2 = 144

Solving
12b + b2 = 144

Solving for variable 'b'.

Reorder the terms:
-144 + 12b + b2 = 144 + -144

Combine like terms: 144 + -144 = 0
-144 + 12b + b2 = 0

Begin completing the square.

Move the constant term to the right:

Add '144' to each side of the equation.
-144 + 12b + 144 + b2 = 0 + 144

Reorder the terms:
-144 + 144 + 12b + b2 = 0 + 144

Combine like terms: -144 + 144 = 0
0 + 12b + b2 = 0 + 144
12b + b2 = 0 + 144

Combine like terms: 0 + 144 = 144
12b + b2 = 144

The b term is 12b.  Take half its coefficient (6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
12b + 36 + b2 = 144 + 36

Reorder the terms:
36 + 12b + b2 = 144 + 36

Combine like terms: 144 + 36 = 180
36 + 12b + b2 = 180

Factor a perfect square on the left side:
(b + 6)(b + 6) = 180

Calculate the square root of the right side: 13.416407865

Break this problem into two subproblems by setting 
(b + 6) equal to 13.416407865 and -13.416407865.

Subproblem 1

b + 6 = 13.416407865 Simplifying b + 6 = 13.416407865 Reorder the terms: 6 + b = 13.416407865 Solving 6 + b = 13.416407865 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + b = 13.416407865 + -6 Combine like terms: 6 + -6 = 0 0 + b = 13.416407865 + -6 b = 13.416407865 + -6 Combine like terms: 13.416407865 + -6 = 7.416407865 b = 7.416407865 Simplifying b = 7.416407865

Subproblem 2

b + 6 = -13.416407865 Simplifying b + 6 = -13.416407865 Reorder the terms: 6 + b = -13.416407865 Solving 6 + b = -13.416407865 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + b = -13.416407865 + -6 Combine like terms: 6 + -6 = 0 0 + b = -13.416407865 + -6 b = -13.416407865 + -6 Combine like terms: -13.416407865 + -6 = -19.416407865 b = -19.416407865 Simplifying b = -19.416407865

Solution

The solution to the problem is based on the solutions from the subproblems. b = {7.416407865, -19.416407865}

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